<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// |         lanfengye <zibin_5257@163.com>
// +----------------------------------------------------------------------

class Page {

    // 分页栏每页显示的页数
    public $rollPage = 3;
    // 页数跳转时要带的参数
    public $parameter;
    // 分页URL地址
    public $url = '';
    // 默认列表每页显示行数
    public $listRows = 20;
    // 起始行数
    public $firstRow;
    // 分页总页面数
    protected $totalPages;
    // 总行数
    protected $totalRows;
    // 当前页数
    public $nowPage;
    // 分页的栏的总页数
    protected $coolPages;
    // 分页显示定制
    protected $config = array('header' => '条', 'prev' => '&laquo; ', 'next' => ' &raquo;', 'first' => '首页', 'last' => '末页', 'theme' => ' <div style="margin: 10px auto;"><div style="width:auto;float:right;margin-left:15px;line-height: 30px;">%go%页</div><div style="width:auto;height:30px;float:right;margin:2px 0px 0px 15px"><div><ul class="pagination" style="float:right;margin-top:0px"><li>%upPage%</li><li>%linkPage%</li><li>%downPage%</li></ul></div></div><div style="width:auto;float:right;margin-top:7px;margin-left:35px">共%totalRow% %header% %nowPage%/%totalPage% 页</div></div> ');
    // 默认分页变量名
    public $varPage;

    /**
     * 架构函数
     * @access public
     * @param array $totalRows  总的记录数
     * @param array $listRows  每页显示记录数
     * @param array $parameter  分页跳转的参数
     */
    public function __construct($totalRows, $listRows = '', $parameter = '', $url = '') {
        $this->totalRows = $totalRows;
        $this->parameter = $parameter;
        $this->varPage = C('VAR_PAGE') ? C('VAR_PAGE') : 'p';
        if (!empty($listRows)) {
            $this->listRows = intval($listRows);
        }
        $this->totalPages = ceil($this->totalRows / $this->listRows);     //总页数
        $this->coolPages = ceil($this->totalPages / $this->rollPage);
        $this->nowPage = !empty($_GET[$this->varPage]) ? intval($_GET[$this->varPage]) : 1;
        if ($this->nowPage < 1) {
            $this->nowPage = 1;
        } elseif (!empty($this->totalPages) && $this->nowPage > $this->totalPages) {
            $this->nowPage = $this->totalPages;
        }
        $this->firstRow = $this->listRows * ($this->nowPage - 1);
    }

    public function setConfig($name, $value) {
        if (isset($this->config[$name])) {
            $this->config[$name] = $value;
        }
    }

    /**
     * 分页显示输出
     * @access public
     */
    public function show() {
        if (0 == $this->totalRows)
            return '';
        $p = $this->varPage;
        $nowCoolPage = ceil($this->nowPage / $this->rollPage);

        // 分析分页参数
        if ($this->url) {
            $depr = C('URL_PATHINFO_DEPR');
            $url = rtrim(U('/' . $this->url, '', false), $depr) . $depr . '__PAGE__';
        } else {
            if ($this->parameter && is_string($this->parameter)) {
                parse_str($this->parameter, $parameter);
            } elseif (is_array($this->parameter)) {
                $parameter = $this->parameter;
            } elseif (empty($this->parameter)) {
                unset($_GET[C('VAR_URL_PARAMS')]);
                $var = !empty($_POST) ? $_POST : $_GET;
                if (empty($var)) {
                    $parameter = array();
                } else {
                    $parameter = $var;
                }
            }
            
            $parameter[$p] = '__PAGE__';
            $url = U('', $parameter);
        }
        //上下翻页字符串
        $upRow = $this->nowPage - 1;
        $downRow = $this->nowPage + 1;
        /* 更改 */
        if ($upRow > 0) {
            $upPage = "<a href='" . str_replace('__PAGE__', $upRow, $url) . "'>" . $this->config['prev'] . "</a>";
            $theFirst = "<a href='" . str_replace('__PAGE__', 1, $url) . "' >" . $this->config['first'] . "</a>";
        } elseif (1 < $this->totalPages) {
            $upPage = '<span>' . $this->config['prev'] . '</span>';
            $theFirst = '<span>' . $this->config['first'] . '</span>';
        } else {
            $upPage = '<span>' . $this->config['prev'] . '</span>';
            $theFirst = '<span>' . $this->config['first'] . '</span>';
        }

        if ($downRow <= $this->totalPages) {
            $theEndRow = $this->totalPages;
            $downPage = "<a href='" . str_replace('__PAGE__', $downRow, $url) . "'>" . $this->config['next'] . "</a>";
            $theEnd = "<a href='" . str_replace('__PAGE__', $theEndRow, $url) . "' >" . $this->config['last'] . "</a>";
        } elseif (1 < $this->totalPages) {
            $downPage = '<span>' . $this->config['next'] . '</span>';
            $theEnd = '<span>' . $this->config['last'] . '</span>';
        } else {
            $downPage = '<span>' . $this->config['next'] . '</span>';
            $theEnd = '<span>' . $this->config['last'] . '</span>';
        }
        
        /* << < > >>
          if($nowCoolPage != 1){
          $theFirst   =   '<span>'.$this->config['first'].'</span>';
          }else{
          $preRow     =   $this->nowPage-$this->rollPage;
          $prePage    =   "<a href='".str_replace('__PAGE__',$preRow,$url)."' >上".$this->rollPage."页</a>";
          $theFirst   =   "<a href='".str_replace('__PAGE__',1,$url)."' >".$this->config['first']."</a>";
          }
          if($nowCoolPage == $this->coolPages){
          $theEnd     =   '<span>'.$this->config['last'].'</span>';
          }else{
          $nextRow    =   $this->nowPage+$this->rollPage;
          $theEndRow  =   $this->totalPages;
          $nextPage   =   "<a href='".str_replace('__PAGE__',$nextRow,$url)."' >下".$this->rollPage."页</a>";
          $theEnd     =   "<a href='".str_replace('__PAGE__',$theEndRow,$url)."' >".$this->config['last']."</a>";
          }
         */
        // 1 2 3 4 5
        $linkPage = "";
        for ($i = 1; $i <= $this->rollPage; $i++) {
            $page = ($this->nowPage - intval($this->rollPage / 2)) <= 0 ? $i : $this->nowPage - intval($this->rollPage / 2) + $i - 1;
            $page = (($this->totalPages - $this->nowPage) >= intval($this->rollPage / 2) || ($this->totalPages < $this->rollPage)) ? $page : $this->totalPages - $this->rollPage + $i;
            if ($page != $this->nowPage) {
                if ($page <= $this->totalPages) {
                    $linkPage .= "<a href='" . str_replace('__PAGE__', $page, $url) . "'>" . $page . "</a>";
                } else {
                    break;
                }
            } else {
                if ($this->totalPages != 1) {
                    $linkPage .= "<span class='current btn-default active'>" . $page . "</span>";
                }
            }
        }
        $thego = '<input type="text" style="width:auto;display:inline-block;" autocomplete="off" id="go_page" value="'.$this->nowPage.'" class="form-control input-sm" name="' . $this->varPage . '" onchange="go_page' . $this->varPage . '(this.value)">';
        $baseUrl = U('');
        unset($parameter[$p]);
        unset($parameter['listrows']);
        foreach ($parameter as $kp => $vp){
            $params[] = "{$kp}={$vp}";
        }
        $params = implode("&", $params);
        if($params){
            $params = '&'.$params;
        }
        $thego .= '<script type="text/javascript">
		function changeURLArg(url,arg,arg_val){ 
			var pattern=arg+"=([^&]*)"; 
			var replaceText=arg+"="+arg_val; 
			if(url.match(pattern)){ 
			var tmp="/("+ arg+"=)([^&]*)/gi"; 
			        tmp=url.replace(eval(tmp),replaceText); 
			return tmp; 
			    }else{ 
			if(url.match("[\?]")){ 
			return url+"&"+replaceText; 
			        }else{ 
			return url+"?"+replaceText; 
			        } 
			    } 
			return url+"\n"+arg+"\n"+arg_val; 
		} 
       function go_page' . $this->varPage . '(page){
            var check = go_page_check('.$this->totalPages.',page,$(this));
			var listrows = $("#listrows option:selected").val();
			if(page.indexOf("listrows") <= 0){
				if(listrows > 0&&check){
					window.location = "'.$baseUrl.'&p="+page+"&listrows="+listrows+"'.$params.'";
				}else{
					//window.location = page;
				}
			}else{
				window.location = changeURLArg(page,"listrows",listrows);
			}
        }
        function go_page_check(totalpage,page,obj) {
        const reg= /^[0-9]*$/;
        if(!reg.test(page)){
            obj.val(\'\');
            alert_crm(\'请输入数字！\');
            return false;
        }else{
            if(page>totalpage){
                alert_crm(\'只有 \'+totalpage+\' 页！\');
                 obj.val(\'\');
                return false;
            }else{
                return true;
            }
        }
    }
        </script>';
        $pageStr = str_replace(
                array('%header%', '%nowPage%', '%totalRow%', '%totalPage%', '%upPage%', '%downPage%', '%first%', '%prePage%', '%linkPage%', '%nextPage%', '%end%', '%go%'), array($this->config['header'], $this->nowPage, $this->totalRows, $this->totalPages, $upPage, $downPage, $theFirst, $prePage, $linkPage, $nextPage, $theEnd, $thego), $this->config['theme']);
        return $pageStr;
    }

}
